Help CenterConnection IssuesUse Connection compatibility for slow or fragmented connections
Connection Issues

Use Connection compatibility for slow or fragmented connections

3 min read·Updated September 16, 2026

HorizonVPN manages tunnel packet settings automatically; use released compatibility controls instead of manual MTU values.

Some networks handle packet sizes differently, which can look like slow loading, stalled downloads, or pages that open only partly. HorizonVPN applies tunnel packet settings from the connection profile and does not expose a manual MTU field in the app.

  1. 1Return Protocol to Auto
  2. 2Open Settings → Connection → Connection compatibility
  3. 3Try Automatic first, then choose a matching regional option if your network needs one
  4. 4Reconnect and test the same website or download
  5. 5Try another nearby location and compare with the built-in Speed test

Do not copy registry, command-line, or network-adapter MTU changes from third-party guides unless your network administrator or HorizonVPN support specifically asks for them. System-wide changes can break non-VPN traffic too.

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